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Author

  • Guido Wirtz (2)
  • Jörg Lenhard (2)
  • Simon Harrer (2)
  • Andreas Schoenberger (1)
  • Johannes Schwalb (1)
  • Matthias Geiger (1)
  • Stefan Fritzemeier (1)
  • Stefan Kolb (1)
  • Thomas Benker (1)
  • Tristan Kessner (1)

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  • 2012 (2)
  • 2009 (1)

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  • Verschiedenartige Texte (2)
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Keywords

  • BPEL (3) (remove)

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  • Lehrstuhl für Praktische Informatik (3) (remove)

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Show/Hide Abstract Bridging the Heterogeneity of Orchestrations – A Petri Net–based Integration of BPEL and Windows Workflow (2012)
Stefan Kolb Jörg Lenhard Guido Wirtz
Service orchestrations are a powerful tool for implementing intra– and interorganizational business processes that base on services. Several heterogeneous orchestration languages can be found in contemporary IT landscapes. While the Web Services Business Process Execution Language (BPEL) is the de facto standard, others gain attention, including Windows Workflow (WF) in the .NET segment. When integrating orchestrations, incompatibilities between them can easily arise. In this paper, we investigate an automated Petri net–based integration between BPEL and WF to solve these issues with behavioral adapter services. We provide a mapping of WF to Open Workflow Nets (oWFNs) and implement it in a compiler. Thereby, we integrate our approach with existing approaches for BPEL and adapter synthesis and validate the integration with a standards–based case study using the two languages.
Show/Hide Abstract Betsy - A BPEL Engine Test System (2012)
Simon Harrer Jörg Lenhard
More than five years have passed since the final release of the long-desired OASIS standard of a process language for web service orchestration, the Web Services Business Process Execution Language (BPEL). The aim of this standard is to establish a universally accepted orchestration language that forms a core part of current service-oriented architectures and, because of standardisation, avoids vendor lock-in. High expectations, in academia and practice alike, have been set on it. By now, several fully conformant and highly scalable engines should have arrived in the market. The perception of many however, is that standard conformance in current engines is far from given. It is our aim to shed light on this situation. In this study, we present the tool betsy, a BPEL Engine Test System that allows for a fully-automatic assessment of the standard conformance of a given BPEL engine. We use it to examine the five most important open source BPEL engines available today. Betsy comes with a large set of engineindependent conformance test cases for assessing BPEL standard conformance. This enables us to give a view of the state of the art in BPEL support.
Show/Hide Abstract QoS-Enabled B2B Integration (2009)
Thomas Benker Stefan Fritzemeier Matthias Geiger Simon Harrer Tristan Kessner Johannes Schwalb Andreas Schoenberger Guido Wirtz
Business-To-Business Integration (B2Bi) is a key mechanism for enterprises to gain competitive advantage. However, developing B2Bi applications is far from trivial. Inter alia, agreement among integration partners about the business documents and the control flow of business document exchanges as well as applying suitable communication technologies for overcoming heterogeneous IT landscapes are major challenges. At the same time, choreography languages such as ebXML BPSS (ebBP), orchestration languages such as WS-BPEL and Web Services are promising to provide the foundations for seamless interactions among business partners. Automatically translating choreography agreements of integration partners into partner-specific orchestrations is an obvious idea for ensuring conformance of orchestration models to choreography models. Moreover, the application of such model-driven development methods facilitates productivity and cost-effectiveness whereas applying a service oriented architecture (SOA) based on WS-BPEL and Web Services leverages standardization and decoupling. By now, the realization of QoS attributes has not yet received the necessary attention that makes such approaches suitable for B2Bi. In this report, we describe a proof-of-concept implementation of the translation of ebBP choreographies into WS-BPEL orchestrations that respects B2Bi-relevant QoS attributes.

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